Water hardness removal system

Abstract

The utility model discloses a water hardness removal system and relates to the technical field of water treatment. According to the technical scheme, the device comprises a water inlet unit, a dosing unit, a treatment unit, a discharge unit and a backwashing unit. The water inlet unit supplies to-be-treated water, the chemical adding unit adds chemicals, the mixing assembly promotes sufficient reaction of the chemicals and the water, an independent sedimentation tank is not needed, and occupied land is saved. A tubular membrane filtering assembly made of PTFE membranes is arranged in the treatment unit, pollution resistance and scaling resistance are achieved, the service life of membrane tubes can be prolonged through a backwashing unit, and manual cleaning and water consumption are reduced. The front-stage reaction part is used for stirring, and the separation part is used for guiding and precipitating, so that the reaction and solid-liquid separation efficiency is improved, and deep hardness removal is realized. The discharging unit effectively treats waste through a waste liquid buffer tank, a filter pressing assembly and the like, and generation of a large amount of waste water is avoided. The system improves the water hardness removal efficiency and quality, reduces the operation cost, is suitable for enterprises with high water standard and limited sites, and meets the deep water treatment requirements.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically a water hardness removal system. Background Technology

[0002] Traditional methods for removing water hardness mainly include: heating softening, chemical softening, ion exchange, and nanofiltration. Each of these methods has significant drawbacks when used individually. Heating only removes temporary hardness with a low removal rate; chemical softening requires a long sedimentation time and a large footprint; ion exchange requires frequent regeneration when water hardness is high, generating large amounts of difficult-to-treat wastewater; and nanofiltration is prone to scaling and clogging when the raw water hardness is high, requiring manual cleaning and consuming large amounts of cleaning water.

[0003] For enterprises with high water quality standards, such as boiler feedwater in the tire industry, which have high requirements for hardness, and when space is limited and insufficient space cannot be provided for sedimentation, the above one or more traditional methods are sometimes insufficient to meet the needs of on-site and subsequent deep water treatment. Utility Model Content

[0004] To address one of the shortcomings of existing technologies, this utility model provides a water hardness removal system that solves the problem of water hardness removal.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water hardness removal system, comprising:

[0006] The water inlet unit is used to supply water that needs to be treated.

[0007] The dosing unit is located on the outlet side of the inlet unit. The dosing unit can add chemicals to the water supplied by the inlet unit.

[0008] The treatment unit is connected to the outlet of the dosing unit. The treatment unit is equipped with a tubular membrane filtration assembly, whose membrane tube is made of PTFE membrane. The treatment unit includes a filter discharge end and a waste liquid discharge end.

[0009] The discharge unit is connected to the waste liquid discharge end of the processing unit and is used to discharge waste materials from water treatment.

[0010] The backwashing unit is connected to the filter discharge end of the processing unit and can backwash the membrane tubes of the processing unit.

[0011] Preferably, the water inlet unit includes:

[0012] Water storage structure, used to store water to be treated;

[0013] A pressurization component is installed on the outlet side of the water storage structure. The pressurization component is used to pressurize the water flow output from the water storage structure.

[0014] Preferably, the dosing unit includes:

[0015] The mixing component has its inlet end connected to the pressurization component via a pipeline, and its outlet end connected to the treatment unit via a pipeline.

[0016] The first drug delivery unit includes a first drug storage structure and a first drug supply component, which can deliver the drug in the first drug storage structure to the mixing component.

[0017] Preferably, it also includes:

[0018] The second dosing unit includes a second drug storage structure and a second drug supply component, which can deliver the drug in the second drug storage structure to the mixing component.

[0019] Preferably, the first drug storage structure of the first drug delivery section is used to store sodium carbonate;

[0020] The second drug storage structure of the second drug delivery section is used to store sodium hydroxide.

[0021] Preferably, the hybrid component includes:

[0022] The mixing tube is a straight tube with one axial end serving as the inlet of the mixing assembly and the other axial end serving as the outlet of the mixing assembly. At least one dosing port is provided on the radial side of the mixing tube corresponding to the first and second dosing sections.

[0023] A mixing element is disposed inside the mixing tube, and the mixing element is a spiral blade.

[0024] Preferably, the processing unit includes:

[0025] The pre-reaction section is connected to the mixing assembly via a pipeline; the outlet of the pre-reaction section is connected to the inlet of the tubular membrane filtration assembly via a pipeline.

[0026] A separation section is located on the effluent side of the pre-reaction section; the separation section is situated below the tubular membrane filtration assembly and can receive the wastewater filtered out by the tubular membrane filtration assembly.

[0027] The end storage section is connected to the filtered water outlet of the tubular membrane filtration assembly, and is used to store the filtered water.

[0028] Preferably, the pre-reaction section includes:

[0029] The pre-reactor has an internal cavity, and the water inlet of the cavity and the water outlet of the mixing pipe are connected by a pipeline.

[0030] The pre-stage agitator is installed inside the pre-stage reactor and can agitate the liquid inside the pre-stage reactor.

[0031] Preferably, the separating section includes:

[0032] A separation tank is located below the tubular membrane filtration assembly. A flow guiding structure is provided in the lower part of the separation tank, and the flow guiding structure includes several inclined tubes.

[0033] A sedimentation tank is located at the bottom of the separation tank. Several sedimentation tanks are provided, and each sedimentation tank has a funnel-shaped structure. The bottom of the sedimentation tank is connected to the discharge unit through a pipeline.

[0034] Preferably, the discharge unit includes:

[0035] The waste liquid buffer tank is connected to the separation section;

[0036] The filter press assembly is connected to the outlet end of the waste liquid buffer tank and can perform filter press treatment on the waste liquid.

[0037] A filter buffer tank, connected to the filter press assembly, is used to store the filter press liquid.

[0038] Compared with existing technologies, this solution offers the following advantages: The mixing components in the dosing unit ensure thorough mixing and reaction of the chemicals with the water, eliminating the need for a separate sedimentation tank after the reaction and reducing floor space requirements. The tubular membrane filtration unit within the treatment unit is made of PTFE membranes, which exhibit excellent fouling resistance and are less prone to scaling and clogging even in high-hardness raw water conditions. Furthermore, the backwashing unit effectively cleans the membrane tubes, extending their lifespan and reducing the frequency of manual cleaning and water consumption.

[0039] The stirring and separation structure of the pre-reaction section and the flow guiding and sedimentation structure of the separation section further improve the reaction and solid-liquid separation efficiency, achieving deep hardness removal. The waste liquid buffer tank, filter press assembly, and filtrate buffer tank design of the discharge unit effectively treat waste materials, avoiding the generation of large amounts of difficult-to-treat wastewater and overcoming the drawbacks of ion exchange methods. In summary, this system effectively improves the efficiency and quality of water hardness removal, reduces floor space, and lowers operating costs. It is suitable for enterprises with high water quality standards and limited space, meeting the needs of on-site and subsequent deep water treatment. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of the water inlet unit structure according to an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the dosing unit structure according to an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the processing unit structure according to an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the discharge unit structure according to an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the backwashing unit structure according to an embodiment of this application.

[0046] In the picture:

[0047] 1. Water inlet unit; 11. Water storage structure; 12. Pressurization component; 2. Chemical dosing unit; 21. Mixing component; 22. First chemical dosing section; 23. Second chemical dosing section; 3. Treatment unit; 31. Pre-reaction section; 32. Tubular membrane filtration component; 33. Separation section; 34. Terminal storage section; 4. Discharge unit; 41. Waste liquid buffer tank; 42. Filtration press component; 43. Filtration liquid buffer tank; 5. Backwashing unit; 51. Negative pressure water tank; 52. Product water tank; 53. Third chemical dosing section; 54. Backwash water pump. Detailed Implementation

[0048] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] Please see Figures 1-6 This application provides the following technical solutions:

[0050] A water hardness removal system includes an inlet unit 1 for supplying water to be treated. The inlet unit 1 includes a water storage structure 11, which can be a tank or pool (one or more structures), storing concentrated water to be treated. A pressurization component 12 is installed on the outlet side of the water storage structure to pressurize the water flow output from the water storage structure 11. A dosing unit 2 is installed on the outlet side of the inlet unit 1 to add chemicals to the water supplied by the inlet unit 1. The water after adding chemicals enters a treatment unit 3, whose inlet end is connected to the outlet end of the dosing unit 2. The treatment unit 3 contains a tubular membrane filtration assembly 32, whose membrane tube is made of PTFE membrane. The treatment unit 3 includes a filter discharge end and a waste liquid discharge end. A discharge unit 4 is connected to the waste liquid discharge end of the treatment unit 3 for discharging waste materials from the water treatment process. In addition, the system also includes a backwashing unit 5, which is connected to the filter discharge end of the processing unit 3 and can backwash the membrane tube of the processing unit 3.

[0051] This solution requires a separate sedimentation tank after chemical dosing, thus saving floor space. The chemically dosed water mixture is directly connected to the PTFE tubular membrane filter module 32. Larger sediment particles can slide to the bottom of treatment unit 3, while suspended particles are removed by membrane filtration and finally discharged to discharge unit 4 through the bottom waste liquid discharge end. After a period of use, the tubular membrane filter module 32 can be backwashed using the backwashing unit 5.

[0052] Based on the above implementation plan, the water storage structure 11 in this plan is a tank with a volume of 25 cubic meters. The booster assembly 12 consists of two CHL15-30 booster pumps, which are connected to the water storage structure 11 through different pipelines. One pump is used as the primary pump, and the other is used as a backup pump.

[0053] Based on the above implementation scheme, the dosing unit 2 includes a mixing component 21, which includes a mixing pipe. One axial end of the mixing pipe is the inlet end of the mixing component 21, and the other axial end is the outlet end of the mixing component 21. The mixing pipe is a straight circular pipe, and two dosing ports are provided on the radial side of the pipe. A mixing element is provided inside the mixing pipe, which is a spiral blade.

[0054] The dosing unit 2 further includes a first dosing section 22 and a second dosing section 23. The first dosing section 22 includes a first drug storage structure and a first drug supply assembly. The second dosing section 23 includes a second drug storage structure and a second drug supply assembly, which can respectively deliver the drugs in the first and second drug storage structures to a mixing pipe. Both the first and second drug storage structures are drug storage tanks; the first drug storage structure stores sodium carbonate, and the second drug storage structure stores sodium hydroxide.

[0055] The first drug storage structure uses a 500L volume tank, and a drug liquid stirrer is installed inside the first drug storage structure. The first drug supply component uses an APG803 pump as the dosing pump. The first dosing unit 22 adopts a one-tank-one-pump configuration, that is, the first dosing unit 22 includes a first drug storage unit combined with a first drug supply component.

[0056] The second drug storage structure uses a 3000L tank made of fiberglass, and also has an internal agitator. The second drug supply unit uses an MS1C138B pump as the dosing pump. The second dosing unit 23 adopts a one-tank-two-pump configuration, that is, the second dosing unit 23 has one second drug storage structure and two second drug supply units.

[0057] Depending on the hardness and alkalinity of the water to be treated, different dosing stations are used to add chemicals.

[0058] Based on the above implementation scheme, the treatment unit 3 includes a pre-reaction section 31, which includes a pre-reactor. The pre-reactor is a box with an internal cavity, and the inlet end of the cavity and the outlet end of the mixing tube are connected by a pipeline. A pre-stirring element is installed inside the pre-reactor to stir the liquid inside. The outlet end of the pre-reactor is connected to the inlet end of the tubular membrane filter assembly 32 by a pipeline. After the reagent is mixed with water in the mixing component 21, it enters the pre-reactor and reacts inside the pre-reactor for at least 40 minutes before entering the tubular membrane filter assembly 32. The tubular membrane filter assembly 32 adopts a 9-pore tubular membrane module with a membrane tube length of 1550 mm, a pore size of 0.2 μm, and a single membrane area of ​​0.72 m2. It adopts a low-flux mode with a designed flux of 150 L / m2·h to reduce the risk of fouling and cleaning frequency. The tubular membrane filter module 32 adopts a single-end sealing mode, using CPVC end caps and frames, which can withstand corrosion from high temperature, high pH, ​​and high salt content. One side of the end cap is fixed inside the treatment unit 3, and the membrane fibers are suspended in the water. It adopts a positive pressure operation mode with water pump supply.

[0059] A separation section 33 is provided below the tubular membrane filter assembly 32. The separation section 33 can receive the wastewater filtered out by the tubular membrane filter assembly 32. The separation section 33 includes a separation tank 331, which is located below the tubular membrane filter assembly 32. A flow guiding structure is provided in the lower part of the separation tank. The flow guiding structure includes several inclined tubes. The dimensions of the separation tank are L*B*H=9600*3800*3500mm.

[0060] Several sedimentation tanks 332 are provided at the bottom of the separation tank 331. The sedimentation tanks 332 have a funnel-shaped structure. The bottom of the sedimentation tanks 332 is connected to the discharge unit 4 through a pipeline. The particulate sediment in the separation tank 331 sinks into the sedimentation tanks 332 through the guide structure and accumulates at the bottom of the sedimentation tanks 332.

[0061] The filtered water outlet of the tubular membrane filtration assembly 32 is connected to the end storage section 34, which is used to store the filtered water. The end storage section 34 is a tank with a funnel-shaped bottom. An outlet is provided at the bottom of the end storage section 34, where a PTFE membrane is also installed for further filtration. The wastewater filtered from the sedimentation tank 332 and the bottom of the end storage section 34 is transported to the discharge unit 4 through pipelines.

[0062] Based on the above implementation scheme, the discharge unit 4 includes a waste liquid buffer tank 41, a filter press assembly 42, and a filtrate buffer tank 43. The waste liquid buffer tank 41 is connected to the separation section 33. Wastewater filtered from the sedimentation tank 332 and the terminal storage section 34 of the separation section 33 is pumped to the waste liquid buffer tank 41 for storage. A GT500 pneumatic diaphragm pump is used as the pump. A stirrer is installed inside the waste liquid buffer tank 41. The outlet of the waste liquid buffer tank 41 is connected to the filter press assembly 42, which includes a filter press for filtering the waste liquid. A XAY20-800 plate and frame filter press is used as the filter press assembly 42. The filtrate discharged from the filter press assembly 42 is transported to the filtrate buffer tank 43, and then the filtrate in the filtrate buffer tank 43 is pumped to the pre-reaction section 31 via a filtrate lift pump. The waste material filtered by the filter press assembly 42 is periodically removed.

[0063] Based on the above implementation scheme, the backwash unit 5 includes a negative pressure water tank 51, which is connected to the treated water outlet of the terminal storage unit 34. The negative pressure water tank 51 is connected to the product water tank 52 via a pipeline. A PTFE membrane is installed in the product water tank 52 to filter the water again. The backwash unit 5 also includes a third chemical dosing unit 53, whose structure is basically the same as that of the first chemical dosing unit 22. The third chemical dosing unit 53 is used to add hydrochloric acid to the product water tank 52. The water in the product water tank 52 can be supplied to other external structures. In addition, the product water tank 52 is also connected to a backwash water pump 54 via a pipeline. The backwash water pump 54 can backwash the water in the product water tank to the terminal storage unit 34 and the tubular membrane filter assembly 32.

[0064] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0068] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0069] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A water hardness removal system, characterized in that, include: The water inlet unit is used to supply water that needs to be treated. The dosing unit is located on the outlet side of the inlet unit. The dosing unit can add chemicals to the water supplied by the inlet unit. The treatment unit is connected to the outlet of the dosing unit. The treatment unit is equipped with a tubular membrane filtration assembly, whose membrane tube is made of PTFE membrane. The treatment unit includes a filter discharge end and a waste liquid discharge end. The discharge unit is connected to the waste liquid discharge end of the processing unit and is used to discharge waste materials from water treatment. The backwashing unit is connected to the filter discharge end of the processing unit and can backwash the membrane tubes of the processing unit.

2. The water hardness removal system as described in claim 1, characterized in that, The water inlet unit includes: Water storage structure, used to store water to be treated; A pressurization component is installed on the outlet side of the water storage structure. The pressurization component is used to pressurize the water flow output from the water storage structure.

3. The water hardness removal system as described in claim 2, characterized in that, The dosing unit includes: The mixing component has its inlet end connected to the pressurization component via a pipeline, and its outlet end connected to the treatment unit via a pipeline. The first drug delivery unit includes a first drug storage structure and a first drug supply component, which can deliver the drug in the first drug storage structure to the mixing component.

4. The water hardness removal system as described in claim 3, characterized in that, Also includes: The second dosing unit includes a second drug storage structure and a second drug supply component, which can deliver the drug in the second drug storage structure to the mixing component.

5. The water hardness removal system as described in claim 4, characterized in that, The first drug storage structure of the first drug delivery section is used to store sodium carbonate; The second drug storage structure of the second drug delivery section is used to store sodium hydroxide.

6. The water hardness removal system as described in claim 5, characterized in that, The hybrid component includes: The mixing tube is a straight tube with one axial end serving as the inlet of the mixing assembly and the other axial end serving as the outlet of the mixing assembly. At least one dosing port is provided on the radial side of the mixing tube corresponding to the first and second dosing sections. A mixing element is disposed inside the mixing tube, and the mixing element is a spiral blade.

7. The water hardness removal system as described in claim 6, characterized in that, The processing unit includes: The pre-reaction section is connected to the mixing assembly via a pipeline; the outlet of the pre-reaction section is connected to the inlet of the tubular membrane filtration assembly via a pipeline. A separation section is located on the effluent side of the pre-reaction section; the separation section is situated below the tubular membrane filtration assembly and can receive the wastewater filtered out by the tubular membrane filtration assembly. The end storage section is connected to the filtered water outlet of the tubular membrane filtration assembly, and is used to store the filtered water.

8. The water hardness removal system as described in claim 7, characterized in that, The pre-reaction section includes: The pre-reactor has an internal cavity, and the water inlet of the cavity and the water outlet of the mixing pipe are connected by a pipeline. The pre-stage agitator is installed inside the pre-stage reactor and can agitate the liquid inside the pre-stage reactor.

9. The water hardness removal system as described in claim 7, characterized in that, The separation section includes: A separation tank is located below the tubular membrane filtration assembly. A flow guiding structure is provided in the lower part of the separation tank, and the flow guiding structure includes several inclined tubes. A sedimentation tank is located at the bottom of the separation tank. Several sedimentation tanks are provided, and each sedimentation tank has a funnel-shaped structure. The bottom of the sedimentation tank is connected to the discharge unit through a pipeline.

10. The water hardness removal system as described in claim 7, characterized in that, The discharge unit includes: The waste liquid buffer tank is connected to the separation section; The filter press assembly is connected to the outlet end of the waste liquid buffer tank and can perform filter press treatment on the waste liquid. A filter buffer tank, connected to the filter press assembly, is used to store the filter press liquid.

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